如何,我想知道9650寄存器的值是多少,但是因为没有源码,要在外部通过什么样的接口来读取,我自己写了个接口(linux不是很熟,随便抄了一个)
int ov9650_readreg(struct device *dev, unsigned char reg,
unsigned char *value)
{
struct i2c_client *client = to_i2c_client(dev);
u8 data = reg;
struct i2c_msg msg;
int ret;
/*
* Send out the register address...
*/
msg.addr = client->addr;
msg.flags = 0;
msg.len = 1;
msg.buf = &data;
ret = i2c_transfer(client->adapter, &msg, 1);
if (ret < 0) {
printk(KERN_ERR "Error %d on register write\n", ret);
return ret;
}
/*
* ...then read back the result.
*/
msg.flags = I2C_M_RD;
ret = i2c_transfer(client->adapter, &msg, 1);
if (ret >= 0) {
*value = data;
ret = 0;
}
return ret;
}
然后在fimc_open里调用
ov9650_readreg(ctrl->dev,0x12,reg_value);
printk(" 0v9650 Reg12 =0x%x\n",*reg_value);
进入摄像头就重启,请问高手该如何读取,谢谢